Writing instrument



FIG. 1 is a front perspective view of a pen showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a side view thereof which is a mirror image of the opposite side thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a front perspective view of a first alternate embodiment of a pen showing my new design which is identical to FIGS. 1 through 7 except for the dark band as shown; and,

FIG. 9 is a rear perspective view thereof. 

The ornamental design of a writing instrument, as shown and described. 